US6175105B1 - Container for microwave cooking of food products containing liquids - Google Patents

Container for microwave cooking of food products containing liquids Download PDF

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Publication number
US6175105B1
US6175105B1 US09/165,080 US16508098A US6175105B1 US 6175105 B1 US6175105 B1 US 6175105B1 US 16508098 A US16508098 A US 16508098A US 6175105 B1 US6175105 B1 US 6175105B1
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US
United States
Prior art keywords
container
exterior
side panel
extending
central axis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US09/165,080
Inventor
Harry A. Rubbright
Nelson J. Beall
Stephen A. Gaeta
M. Debbie Meiners
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unilever Bestfoods North America
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Unilever Bestfoods North America
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Unilever Bestfoods North America filed Critical Unilever Bestfoods North America
Priority to US09/165,080 priority Critical patent/US6175105B1/en
Assigned to BESTFOODS reassignment BESTFOODS ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BEALL, NELSON J., GAETA, STEPHEN A., MEINERS, M. DEBBIE, RUBBRIGHT, HARRY A.
Priority to US09/215,012 priority patent/US6217918B1/en
Priority to NZ335590A priority patent/NZ335590A/en
Priority to IL12979899A priority patent/IL129798A/en
Priority to NZ335616A priority patent/NZ335616A/en
Priority to ZA9903150A priority patent/ZA993150B/en
Priority to EP99108580A priority patent/EP0954981B1/en
Priority to AT99108581T priority patent/ATE276165T1/en
Priority to DE69920128T priority patent/DE69920128T2/en
Priority to DE69914400T priority patent/DE69914400T2/en
Priority to EP99108581A priority patent/EP0990597B1/en
Priority to KR1019990016183A priority patent/KR20000028569A/en
Priority to EP00115662A priority patent/EP1046346A3/en
Priority to AT99108580T priority patent/ATE258385T1/en
Priority to BR9901987-6A priority patent/BR9901987A/en
Priority to CO99028297A priority patent/CO5060507A1/en
Priority to SG1999002150A priority patent/SG73638A1/en
Priority to IL12984199A priority patent/IL129841A/en
Priority to NO992240A priority patent/NO992240L/en
Priority to JP11127711A priority patent/JP2000107028A/en
Priority to KR1019990016377A priority patent/KR19990088127A/en
Priority to PL99333002A priority patent/PL188753B1/en
Priority to CA002271334A priority patent/CA2271334C/en
Priority to AU26994/99A priority patent/AU754912B2/en
Priority to CA002271360A priority patent/CA2271360A1/en
Priority to PL99333003A priority patent/PL333003A1/en
Priority to JP11127590A priority patent/JPH11346692A/en
Priority to ARP990102159 priority patent/AR013039A1/en
Priority to SG1999002149A priority patent/SG72951A1/en
Priority to TW088107447A priority patent/TW457213B/en
Publication of US6175105B1 publication Critical patent/US6175105B1/en
Application granted granted Critical
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/02—Stoves or ranges heated by electric energy using microwaves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package
    • B65D81/3446—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package specially adapted to be heated by microwaves
    • B65D81/3453—Rigid containers, e.g. trays, bottles, boxes, cups
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L23/00—Soups; Sauces; Preparation or treatment thereof
    • A23L23/10—Soup concentrates, e.g. powders or cakes
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L7/00—Cereal-derived products; Malt products; Preparation or treatment thereof
    • A23L7/10—Cereal-derived products
    • A23L7/109—Types of pasta, e.g. macaroni or noodles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/22—Boxes or like containers with side walls of substantial depth for enclosing contents
    • B65D1/26—Thin-walled containers, e.g. formed by deep-drawing operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2581/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D2581/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within
    • B65D2581/3401—Cooking or heating method specially adapted to the contents of the package
    • B65D2581/3402—Cooking or heating method specially adapted to the contents of the package characterised by the type of product to be heated or cooked
    • B65D2581/3404—Cooking pasta dishes, e.g. noodles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2581/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D2581/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within
    • B65D2581/3437—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within specially adapted to be heated by microwaves
    • B65D2581/3439—Means for affecting the heating or cooking properties
    • B65D2581/3455—Packages having means for improving the internal circulation of air
    • B65D2581/3456—Means for holding the contents at a distance from the base of the package, e.g. raised islands or protrusions
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S99/00—Foods and beverages: apparatus
    • Y10S99/14—Induction heating

Definitions

  • the present invention has to do with a container that provides improved cooking properties in a microwave oven. More specifically, the invention relates to a bowl having geometric features which improve the efficiency and uniformity of microwave cooking of food products containing liquids and which enhance boiling uniformity while preventing boil over of the contents.
  • Microwave cooking is frequently associated with uneven heating and boiling over of liquid contents.
  • One of the ways of minimizing these problems is to cook for a brief time, stir, cook again, stir again, and so forth until the cooking is complete.
  • Consumer preference is to cook the product once and remove it from the microwave oven in a condition that is ready to eat.
  • the present invention overcomes the problems associated with the prior art by providing a combination of geometric features which enhance the efficiency and uniformity of microwave cooking by taking into account the dielectric properties of the liquid-containing food products being cooked and the geometry of the container in relation to the microwave wavelength.
  • the design also causes the liquid contents to cook with boiling while preventing boil over.
  • the container of the invention is in the form of a bowl having a bottom portion and a side panel and the bowl is dimensioned to preclude the establishment of a resonance phenomena (standing wave), which would result in an unpredictable microwave heating, by having a base in the shape of a torus with a diameter large enough to minimize or preclude internal resonance in a liquid-containing food. The diameter also is small enough to permit effective microwave cooking of the contents.
  • the bottom portion of the bowl comprises a central segment and an outer segment with the central segment being in the form of a push-up in the shape of a section of a sphere.
  • the push-up extends to a bottom panel along a first bottom radius and the bottom panel extends to the side panel along one or more than one additional bottom radii (i.e., at least a second bottom radius).
  • the outer segment is comprised of the first bottom radius, the bottom panel and one or more than one additional bottom radii.
  • the first bottom radius and the one additional bottom radius i.e., the second bottom radius
  • the radius extends continuously from the push-up to the side panel forming a curved bottom panel.
  • the side panel of the bowl is tapered outwardly from the bottom as it extends toward an opening at the top of the bowl and a rim is provided at the top in the form of a flange with a rolled outer edge to provide a surface for adhering a lid and to add structural strength.
  • a bottom rib is optionally provided to raise the bowl slightly off the shelf of the microwave oven so that heat loss from the bowl to the shelf of the oven is minimized.
  • the bowl can be disposable or reusable and is produced by conventional processing techniques for molding of any suitable plastic material, for example, injection molding, thermoforming and the like.
  • FIG. 1 is a side elevational view of the bowl of the invention.
  • FIG. 2 is a bottom elevational view of the bowl of the invention.
  • FIG. 3 is a section view of the bowl of the invention.
  • FIG. 4 is a perspective view of a lid for the bowl.
  • FIG. 5 is a section/schematic view illustrating the bowl of the invention in a microwave oven.
  • FIG. 6 is a section view of a bowl of the invention having a curved bottom panel.
  • the container of the invention is for microwave cooking of products containing liquid, especially water.
  • suitable products include dehydrated and rehydratable foods such as soups, sauces, pasta and cereals wherein water is added before cooking.
  • FIGS. 1 - 3 A preferred embodiment of a container of the invention in the form of a bowl 10 is illustrated in FIGS. 1 - 3 .
  • Bowl 10 is comprised of a generally circular bottom portion which comprises a push-up 12 having an apex 13 on the central axis X—X of the bowl. (Sprue 14 may be left at the apex 13 on the underside of the pushup 12 if the bowl is manufactured using an injection molding process.)
  • Push-up 12 comprises a section of a sphere.
  • the push-up increases the surface area of the bowl adjacent to the contained food so that the probability of microwaves entering the bowl and heating the food is increased.
  • Bottom panel 11 extends to push-up 12 along first bottom radius 15 which is smooth and without sharp edges because sharp edges within the bowl can cause uneven cooking and they can contribute to boiling over by providing additional nucleation points. Smooth radii, in contrast to sharp edges, facilitate the convective movement of liquid as it heats.
  • Bottom panel 11 also extends along second and third bottom radii 16 and 17 , having a substantially frusto-conical portion 11 a therebetween, said frusto-conical portion having a smooth surface on the inside of the bowl and a plurality of lower ribs 30 radially disposed on the outside of the bowl.
  • Lower ribs 30 can extend beyond frusto-conical portion 11 a as illustrated in FIG. 1 wherein they extend over the exterior of radii 16 and 17 .
  • the smooth inside surface of frusto-conical portion 11 a and radii 16 and 17 are without sharp edges for the same reasons as explained above.
  • Lower ribs 30 provide an area on the outside of the bowl which can be handled when the bowl is hot with reduced transfer of heat to the consumer's hands.
  • Portion 11 a extends along radius 17 to side panel 18 and side panel 18 tapers outwardly away from axis X—X, as it extends from the bottom portion toward an end opening defined by rim 19 .
  • the taper of the side panel has a sufficient slope to release the steam which will be convected up the inside walls during cooking.
  • the outer segment of the bottom portion also has a doughnut-like shape which assists in this convection by having a lower temperature than the area about the push-up.
  • the shape of the bottom of the bowl also provides an area in which dry ingredients can collect. With the addition of water, the ingredients rehydrate in a concentrated area and rehydrate faster.
  • Rim 19 has a flat portion 20 which substantially lies in a plane normal to axis X—X and which facilitates sealing a lid 60 (FIG. 4) on top of the bowl 10 .
  • Conventional lid materials and sealing adhesives can be employed as will be apparent to those skilled in the art.
  • the rim 19 has a rolled outer edge to provide strength so that the consumer can lift the bowl 10 using the rim, particularly after cooking when the bowl may become more flexible due to heating.
  • Upper ribs 31 are radially disposed on the exterior of the side panel of the bowl and extend downwardly from rim 19 to provide an area on the exterior of the bowl which can be handled when the bowl is hot with reduced transfer of heat to the consumer's hand.
  • the upper ribs 31 are sufficiently spaced from lower ribs 30 to provide an area 32 for labeling.
  • Optional bottom rib 21 is disposed on the underside of bottom panel 11 to raise bowl 10 slightly off the shelf 47 of the microwave oven 40 , thereby reducing the transfer of heat from the bowl to the shelf by providing air insulation.
  • FIG. 6 illustrates an embodiment of the invention having a curved bottom panel 11 .
  • radii 15 , 16 can be the same or different and when they are different the curve can be in the shape of an ellipse.
  • this embodiment can have all of the features of the aforesaid embodiment.
  • lower ribs can be radially disposed on a portion of the exterior of the bottom panel extending downwardly from the side panel toward a low point (i.e., the perigee or point of contact) of the bottom panel.
  • microwave ovens energy enters into an oven cavity through a feed slot.
  • the slot can be on the top, bottom or side, and energy is reflected off the walls and bottom of the oven and into the product being heated.
  • a minimum amount of energy is reflected from the bottom of the oven into the bowl because the bowl bottom is relatively small in area and the top of the shelf is only raised off the bottom by a short distance.
  • the spherical section increases the overall exposed area of the bottom portion of the bowl, providing greater area for microwave energy to enter the bottom of the bowl. Push-up 12 also reduces the thickness of the product to be heated in the center.
  • the geometry of the bowl causes the portion of the contents which fill the section below a plane normal to axis X—X and intersecting push-up 12 at apex 13 (plane Y—Y in FIG. 5) to be cooler than the contents above the push-up 12 and thereby promotes convective rotation of the liquid-containing contents.
  • the slanted walls of the bowl and the section in the bottom of the bowl, below plane Y—Y, permit the dissipation of the pressure that builds up from boiling, which is created by the amount of energy induced into the bowl. With a wider top diameter than the bottom, the less vigorously the product will boil and this helps to avoid bumping.
  • FIG. 5 illustrates a microwave oven having a feed slot at the top and shows how microwave energy can be directed into and through the bottom of the cooking container.
  • the bowl of the invention has a torus (doughnut) shape.
  • the effective circumference of the torus should be greater than a whole number of half wavelengths in order to avoid or minimize the occurrence of so called ring-resonance. Accordingly, in conventional microwave ovens which operate at a frequency of about 2,450 megahertz (MHz), the resonance lengths to be avoided in terms of effective diameter of the torus are about 60, 120 and 180 mm. (Since there is some wave penetration into a dielectric, its “microwave diameter” becomes slightly less than its geometrical diameter.) The effective diameter of the torus, therefore, must be large enough to have an antiresonant effect.
  • the effective diameter must be greater than 60 mm, preferably greater than about 65 mm, so that the effective circumference of the torus (at the effective diameter) becomes antiresonant. (If a microwave oven operated at a frequency different from about 2,450 MHz, the effective diameter would be adjusted accordingly, as would be apparent to one skilled in the art.) As a practical matter, for efficient microwave heating, the effective diameter of the torus also should be less than about 100 mm.
  • a torus has a centerline diameter and a body diameter.
  • the effective diameter is measured at the outer line of contact of the bowl with the shelf of the microwave oven when the contents of the bowl include a substantial amount of water. (Effective diameter is measured at this line when the contents of the bowl are products containing liquid as defined herein and this is based on the dielectrics of the water, a load with a high dielectric constant. As the load becomes dryer, the effective diameter is measured at a higher line (away from the bottom panel and toward the end opening) defined by a plane normal to the X-axis which intersects the outer diameter of the torus.
  • the effective diameter could be measured at the average radius of curvature.
  • a semi-dry load i.e., a lower dielectric constant load
  • the effective diameter is measured at the place where the outer line of contact would be in the absence of bottom rib 21 .
  • the effective diameter of the torus of the bowl of the present invention is the distance d illustrated in FIG. 3 for products containing liquid.
  • the bowl of the invention accordingly has a torus with an effective diameter sufficiently large to have an antiresonant effect.
  • the diameter of the torus is more than 60 mm, preferably more than about 65 mm, and less than about 100 mm.
  • the bowl can be manufactured using any food grade materials which can withstand at least the temperature of boiling water or the contents of the container.
  • Various polymers and polymer blends are suitable and they can include polyethylene terephthalate, polycarbonate, polyacrylonitrite, nylons, glass, polypropylene and polyethylene.
  • a preferred material used to make the bowl is polypropylene and this can have high density polyethylene mixed therein to increase resistance to impact breakage at low temperatures.
  • a disposable bowl was made by injection molding a blend of polypropylene and high density polyethylene.
  • the inside diameter at the end opening was 110 mm and the inside diameter at the bottom of the side panel (where the side panel 18 meets radius 17 in FIG. 3) in a plane normal to the central axis was 95 mm.
  • the diameter of the torus was 65 mm.
  • the interior height of the bowl from the bottom panel to the end opening was 75 mm.
  • the push-up had an outside diameter (i.e., inside the bowl) of 45 mm and a height from the lowest point inside the bottom of the bowl of 10 mm.
  • the bowl was filled with liquid to a fill line located 25 mm below the end opening and subjected to microwave heating. The liquid boiled vigorously without boiling over.

Abstract

A container for microwave cooking having geometric features which improve the efficiency and uniformity of microwave cooking of food products containing liquids and which enhance boiling uniformity while preventing boilover of the contents. The container has a bottom portion and a side panel wherein the bottom portion contains a central segment in the shape of a section of a sphere. The side panel is tapered outwardly as it extends from the bottom portion to an end opening. Sharp corners are avoided within the container. As the result of the geometry of the container, a more uniform distribution of heat within the contents of the container is attained during cooking and the combination of uniform heating, the lack of sharp corners and the tapered side panel causes boiling of the contents without bumping, thereby minimizing the risk of boil over.

Description

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention has to do with a container that provides improved cooking properties in a microwave oven. More specifically, the invention relates to a bowl having geometric features which improve the efficiency and uniformity of microwave cooking of food products containing liquids and which enhance boiling uniformity while preventing boil over of the contents.
2. The Prior Art
Microwave cooking is frequently associated with uneven heating and boiling over of liquid contents. One of the ways of minimizing these problems is to cook for a brief time, stir, cook again, stir again, and so forth until the cooking is complete. Consumer preference, however, is to cook the product once and remove it from the microwave oven in a condition that is ready to eat.
The present invention overcomes the problems associated with the prior art by providing a combination of geometric features which enhance the efficiency and uniformity of microwave cooking by taking into account the dielectric properties of the liquid-containing food products being cooked and the geometry of the container in relation to the microwave wavelength. The design also causes the liquid contents to cook with boiling while preventing boil over.
SUMMARY OF THE INVENTION
The container of the invention is in the form of a bowl having a bottom portion and a side panel and the bowl is dimensioned to preclude the establishment of a resonance phenomena (standing wave), which would result in an unpredictable microwave heating, by having a base in the shape of a torus with a diameter large enough to minimize or preclude internal resonance in a liquid-containing food. The diameter also is small enough to permit effective microwave cooking of the contents.
The bottom portion of the bowl comprises a central segment and an outer segment with the central segment being in the form of a push-up in the shape of a section of a sphere. The push-up extends to a bottom panel along a first bottom radius and the bottom panel extends to the side panel along one or more than one additional bottom radii (i.e., at least a second bottom radius). Accordingly, the outer segment is comprised of the first bottom radius, the bottom panel and one or more than one additional bottom radii. In one embodiment, the first bottom radius and the one additional bottom radius (i.e., the second bottom radius) are the same and the radius extends continuously from the push-up to the side panel forming a curved bottom panel.
The side panel of the bowl is tapered outwardly from the bottom as it extends toward an opening at the top of the bowl and a rim is provided at the top in the form of a flange with a rolled outer edge to provide a surface for adhering a lid and to add structural strength.
Externally at the bottom of the bowl a bottom rib is optionally provided to raise the bowl slightly off the shelf of the microwave oven so that heat loss from the bowl to the shelf of the oven is minimized.
The bowl can be disposable or reusable and is produced by conventional processing techniques for molding of any suitable plastic material, for example, injection molding, thermoforming and the like.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a side elevational view of the bowl of the invention.
FIG. 2 is a bottom elevational view of the bowl of the invention.
FIG. 3 is a section view of the bowl of the invention.
FIG. 4 is a perspective view of a lid for the bowl.
FIG. 5 is a section/schematic view illustrating the bowl of the invention in a microwave oven.
FIG. 6 is a section view of a bowl of the invention having a curved bottom panel.
DETAILED DESCRIPTION OF THE INVENTION
The container of the invention is for microwave cooking of products containing liquid, especially water. Examples of suitable products include dehydrated and rehydratable foods such as soups, sauces, pasta and cereals wherein water is added before cooking.
A preferred embodiment of a container of the invention in the form of a bowl 10 is illustrated in FIGS. 1-3. Bowl 10 is comprised of a generally circular bottom portion which comprises a push-up 12 having an apex 13 on the central axis X—X of the bowl. (Sprue 14 may be left at the apex 13 on the underside of the pushup 12 if the bowl is manufactured using an injection molding process.)
Push-up 12 comprises a section of a sphere. The push-up increases the surface area of the bowl adjacent to the contained food so that the probability of microwaves entering the bowl and heating the food is increased. Bottom panel 11 extends to push-up 12 along first bottom radius 15 which is smooth and without sharp edges because sharp edges within the bowl can cause uneven cooking and they can contribute to boiling over by providing additional nucleation points. Smooth radii, in contrast to sharp edges, facilitate the convective movement of liquid as it heats. Bottom panel 11 also extends along second and third bottom radii 16 and 17, having a substantially frusto-conical portion 11 a therebetween, said frusto-conical portion having a smooth surface on the inside of the bowl and a plurality of lower ribs 30 radially disposed on the outside of the bowl. Lower ribs 30 can extend beyond frusto-conical portion 11 a as illustrated in FIG. 1 wherein they extend over the exterior of radii 16 and 17. The smooth inside surface of frusto-conical portion 11 a and radii 16 and 17 are without sharp edges for the same reasons as explained above. Lower ribs 30 provide an area on the outside of the bowl which can be handled when the bowl is hot with reduced transfer of heat to the consumer's hands.
Portion 11 a extends along radius 17 to side panel 18 and side panel 18 tapers outwardly away from axis X—X, as it extends from the bottom portion toward an end opening defined by rim 19. The taper of the side panel has a sufficient slope to release the steam which will be convected up the inside walls during cooking. The outer segment of the bottom portion also has a doughnut-like shape which assists in this convection by having a lower temperature than the area about the push-up. The shape of the bottom of the bowl also provides an area in which dry ingredients can collect. With the addition of water, the ingredients rehydrate in a concentrated area and rehydrate faster.
Rim 19 has a flat portion 20 which substantially lies in a plane normal to axis X—X and which facilitates sealing a lid 60 (FIG. 4) on top of the bowl 10. Conventional lid materials and sealing adhesives can be employed as will be apparent to those skilled in the art. The rim 19 has a rolled outer edge to provide strength so that the consumer can lift the bowl 10 using the rim, particularly after cooking when the bowl may become more flexible due to heating. Upper ribs 31 are radially disposed on the exterior of the side panel of the bowl and extend downwardly from rim 19 to provide an area on the exterior of the bowl which can be handled when the bowl is hot with reduced transfer of heat to the consumer's hand. The upper ribs 31 are sufficiently spaced from lower ribs 30 to provide an area 32 for labeling.
Optional bottom rib 21 is disposed on the underside of bottom panel 11 to raise bowl 10 slightly off the shelf 47 of the microwave oven 40, thereby reducing the transfer of heat from the bowl to the shelf by providing air insulation.
FIG. 6 illustrates an embodiment of the invention having a curved bottom panel 11. In this embodiment, radii 15, 16 can be the same or different and when they are different the curve can be in the shape of an ellipse. Other than the shape of the bottom, this embodiment can have all of the features of the aforesaid embodiment. For example, lower ribs can be radially disposed on a portion of the exterior of the bottom panel extending downwardly from the side panel toward a low point (i.e., the perigee or point of contact) of the bottom panel.
In microwave ovens, energy enters into an oven cavity through a feed slot. The slot can be on the top, bottom or side, and energy is reflected off the walls and bottom of the oven and into the product being heated. When a conventional bowl is placed in a microwave oven, a minimum amount of energy is reflected from the bottom of the oven into the bowl because the bowl bottom is relatively small in area and the top of the shelf is only raised off the bottom by a short distance.
According to the present invention, the spherical section (push-up 12) increases the overall exposed area of the bottom portion of the bowl, providing greater area for microwave energy to enter the bottom of the bowl. Push-up 12 also reduces the thickness of the product to be heated in the center.
The geometry of the bowl causes the portion of the contents which fill the section below a plane normal to axis X—X and intersecting push-up 12 at apex 13 (plane Y—Y in FIG. 5) to be cooler than the contents above the push-up 12 and thereby promotes convective rotation of the liquid-containing contents. The slanted walls of the bowl and the section in the bottom of the bowl, below plane Y—Y, permit the dissipation of the pressure that builds up from boiling, which is created by the amount of energy induced into the bowl. With a wider top diameter than the bottom, the less vigorously the product will boil and this helps to avoid bumping. (Bumping is a build up of pressure in a region of a liquid that becomes superheated and then suddenly erupts causing the container to jump and produce a thumping or bumping sound. Vertical bowl or cup walls hinder convection, prevent the gradual release of pressure and cause more frequent bumping.)
FIG. 5 illustrates a microwave oven having a feed slot at the top and shows how microwave energy can be directed into and through the bottom of the cooking container. When bowl 10 is placed on shelf 47 in microwave oven 40 to cook the contents 50, microwave energy enters the oven from feed slot 46 and some of the energy is emitted in the direction of arrows 41. This energy is reflected off walls 44 in the direction of arrows 42 and is again reflected off bottom 45 in the direction of arrows 43. Accordingly, energy is ultimately directed into and through the spherical section of pushup 12 to heat contents 50. When contents 50 are sufficiently heated, the geometry of the bowl causes controlled boiling to occur without boil over. The controlled boil is achieved by the uniform distribution of heat, the lack of sharp corners within the bowl and the tapered sides 18. Bumping is accordingly avoided and the risk of boil over is minimized.
Geometrically, when viewed from the bottom, the bowl of the invention has a torus (doughnut) shape. The effective circumference of the torus should be greater than a whole number of half wavelengths in order to avoid or minimize the occurrence of so called ring-resonance. Accordingly, in conventional microwave ovens which operate at a frequency of about 2,450 megahertz (MHz), the resonance lengths to be avoided in terms of effective diameter of the torus are about 60, 120 and 180 mm. (Since there is some wave penetration into a dielectric, its “microwave diameter” becomes slightly less than its geometrical diameter.) The effective diameter of the torus, therefore, must be large enough to have an antiresonant effect. For conventional microwave ovens, the effective diameter must be greater than 60 mm, preferably greater than about 65 mm, so that the effective circumference of the torus (at the effective diameter) becomes antiresonant. (If a microwave oven operated at a frequency different from about 2,450 MHz, the effective diameter would be adjusted accordingly, as would be apparent to one skilled in the art.) As a practical matter, for efficient microwave heating, the effective diameter of the torus also should be less than about 100 mm.
A torus has a centerline diameter and a body diameter. For definitional purposes in the present specification, the effective diameter is measured at the outer line of contact of the bowl with the shelf of the microwave oven when the contents of the bowl include a substantial amount of water. (Effective diameter is measured at this line when the contents of the bowl are products containing liquid as defined herein and this is based on the dielectrics of the water, a load with a high dielectric constant. As the load becomes dryer, the effective diameter is measured at a higher line (away from the bottom panel and toward the end opening) defined by a plane normal to the X-axis which intersects the outer diameter of the torus. Accordingly, for a semi-dry load (i.e., a lower dielectric constant load) the effective diameter could be measured at the average radius of curvature.) When an optional bottom rib 21 is disposed on the underside of bottom panel 11, however, the rib is not considered as defining the line of contact for purposes of measuring the effective diameter. Accordingly, the effective diameter is measured at the place where the outer line of contact would be in the absence of bottom rib 21.
The effective diameter of the torus of the bowl of the present invention is the distance d illustrated in FIG. 3 for products containing liquid. The bowl of the invention accordingly has a torus with an effective diameter sufficiently large to have an antiresonant effect. In the preferred embodiment of the invention, the diameter of the torus is more than 60 mm, preferably more than about 65 mm, and less than about 100 mm.
The bowl can be manufactured using any food grade materials which can withstand at least the temperature of boiling water or the contents of the container. Various polymers and polymer blends are suitable and they can include polyethylene terephthalate, polycarbonate, polyacrylonitrite, nylons, glass, polypropylene and polyethylene. A preferred material used to make the bowl is polypropylene and this can have high density polyethylene mixed therein to increase resistance to impact breakage at low temperatures.
EXAMPLE
A disposable bowl was made by injection molding a blend of polypropylene and high density polyethylene. The inside diameter at the end opening was 110 mm and the inside diameter at the bottom of the side panel (where the side panel 18 meets radius 17 in FIG. 3) in a plane normal to the central axis was 95 mm. The diameter of the torus was 65 mm. The interior height of the bowl from the bottom panel to the end opening was 75 mm. The push-up had an outside diameter (i.e., inside the bowl) of 45 mm and a height from the lowest point inside the bottom of the bowl of 10 mm. The bowl was filled with liquid to a fill line located 25 mm below the end opening and subjected to microwave heating. The liquid boiled vigorously without boiling over.

Claims (16)

What is claimed is:
1. A container for use in microwave cooking in an oven operating at a microwave wavelength, said container having a bottom portion essentially defining a torus in bottom plan view, said torus having an effective circumference greater than a whole number of half wavelengths and an effective diameter, measured according to the dielectric constants of the contents of said container, sufficiently large to have an antiresonant effect, a side panel extending from said bottom portion and a cover receiving lip structure extending about and defining an end opening opposite the bottom portion, said side panel extending about a central axis through the bottom portion and end opening and comprising:
said bottom portion having a central segment and an outer segment, a substantially spherical section defining the central segment and having an apex on the central axis, the apex being disposed toward the end opening; said substantially spherical section having a substantially circular base intersecting a plane extending normal to the central axis, the outer segment having a base portion extending downward from said substantially circular base and away from the end opening along a first bottom radius and in a direction away from the central axis to a bottom panel, said bottom panel being substantially circular and extending away from the central axis along a plane extending substantially normal to the central axis to a second bottom radius and then extending upwardly along said second bottom radius away from said bottom portion and toward the end opening to the side panel;
said side panel having an exterior and having a continuous inner wall face intersecting a plane extending normal to the central axis along a substantially circular line and having a larger radius at the end opening than at the bottom portion whereby the inner wall face is tapered away from the central axis as the side panel extends upwardly from the bottom portion toward the end opening, said inner wall face having a sufficient slope to permit the gradual dissipation of pressure built up from boiling the contents of said container to reduce the frequency of bumping.
2. The container of claim 1 wherein the outer segment further comprises a frusto-conical portion disposed between the second bottom radius and the side panel, said second bottom radius extending to the frusto-conical portion and said frusto-conical portion extending upwardly and tapering away from the central axis to a third bottom radius, the third bottom radius extending upwardly to the side panel.
3. The container of claim 2 having lower ribs radially disposed on the exterior of the frusto-conical portion.
4. The container of claim 3 wherein said lower ribs extend along the exterior of the third bottom radius.
5. The container of claim 4 wherein said lower ribs extend along the exterior of the second bottom radius.
6. The container of claim 6 having upper ribs radially disposed on the exterior of the side panel and extending downwardly from the cover receiving lip structure along a portion of said exterior.
7. The container of claim 6 wherein a smooth labeling surface is defined on the exterior of the side panel by the space between the upper ribs and the lower ribs.
8. The container of claim 1 further comprising a bottom rib disposed on the exterior of said bottom panel, said bottom rib extending away from the end opening.
9. The container of claim 1 wherein the cover receiving lip structure is comprised of a substantially circular flange extending from the side panel away from the central axis in a plane normal to the central axis and further extending along a radius downwardly from the end opening to define a rolled outer edge.
10. The container of claim 1 having lower ribs radially disposed on the exterior of the outer segment.
11. The container of claim 1 having upper ribs radially disposed on the exterior of the side panel and extending downwardly from the cover receiving lip structure along a portion of said exterior.
12. The container of claim 1 having a curved bottom panel wherein the first bottom radius and the second bottom radius are the same or different.
13. The container of claim 12 having lower ribs radially disposed on a portion of the exterior of the curved bottom panel, extending downwardly from side panel toward a low point of the curved bottom.
14. The container of claim 13 having upper ribs radially disposed on the exterior of the side panel and extending downwardly from the cover receiving lip structure along a portion of said exterior.
15. The container of claim 12 having upper ribs radially disposed on the exterior of the side panel and extending downwardly from the cover receiving lip structure along a portion of said exterior.
16. The container of claim 1 wherein said torus has an effective diameter greater than 60 mm and less than about 100 mm.
US09/165,080 1998-05-08 1998-10-02 Container for microwave cooking of food products containing liquids Expired - Fee Related US6175105B1 (en)

Priority Applications (30)

Application Number Priority Date Filing Date Title
US09/165,080 US6175105B1 (en) 1998-10-02 1998-10-02 Container for microwave cooking of food products containing liquids
US09/215,012 US6217918B1 (en) 1998-05-08 1998-12-17 Microwavable pasta in a bowl
NZ335590A NZ335590A (en) 1998-10-02 1999-05-04 Container for microwave cooking of food, spherical section push-up in bottom
IL12979899A IL129798A (en) 1998-05-08 1999-05-05 Microwavable pasta in a bowl
NZ335616A NZ335616A (en) 1998-05-08 1999-05-05 Microwaveable pasta in a container and having a degree of gelatinization of from 15-80%
EP99108580A EP0954981B1 (en) 1998-05-08 1999-05-06 Microwavable pasta in a bowl
ZA9903150A ZA993150B (en) 1998-10-02 1999-05-06 Container for microwave cooking of food products containing liquids.
AT99108581T ATE276165T1 (en) 1998-10-02 1999-05-06 CONTAINER FOR COOKING IN MICROWAVE OVENS
DE69920128T DE69920128T2 (en) 1998-10-02 1999-05-06 Containers for cooking in microwave ovens
DE69914400T DE69914400T2 (en) 1998-05-08 1999-05-06 Microwave-heated pasta in a bowl
EP99108581A EP0990597B1 (en) 1998-10-02 1999-05-06 Container for microwave cooking
KR1019990016183A KR20000028569A (en) 1998-10-02 1999-05-06 Container for microwave cooking of food products containing liquids
EP00115662A EP1046346A3 (en) 1998-05-08 1999-05-06 Microwavable pasta in a bowl
AT99108580T ATE258385T1 (en) 1998-05-08 1999-05-06 MICROWAVE PASTA IN A BOWL
SG1999002150A SG73638A1 (en) 1998-05-08 1999-05-07 Microwave pasta in a bowl
AU26994/99A AU754912B2 (en) 1998-10-02 1999-05-07 Container for microwave cooking of food products containing liquids
BR9901987-6A BR9901987A (en) 1998-05-08 1999-05-07 Convenience food product, process to hydrate the product, and hydrated product.
IL12984199A IL129841A (en) 1998-10-02 1999-05-07 Container for microwave cooking of food products containing liquids
NO992240A NO992240L (en) 1998-05-08 1999-05-07 Pasta for microwave treatment in a bowl
JP11127711A JP2000107028A (en) 1998-10-02 1999-05-07 Vessel for microwave cooking liquid containing foodstuff
KR1019990016377A KR19990088127A (en) 1998-05-08 1999-05-07 Microwavable pasta in a bowl
PL99333002A PL188753B1 (en) 1998-10-02 1999-05-07 Pot for cooking liquid containing food products in microwave ovens
CA002271334A CA2271334C (en) 1998-10-02 1999-05-07 Container for microwave cooking of food products containing liquids
CO99028297A CO5060507A1 (en) 1998-05-08 1999-05-07 PASTA OVEN IN MICROWAVE OVEN IN A BOWL WITH A PORTION OF PRECISE PASTE
CA002271360A CA2271360A1 (en) 1998-05-08 1999-05-07 Microwavable pasta in a bowl
PL99333003A PL333003A1 (en) 1998-05-08 1999-05-07 Food product in a container for cooking in a microwave oven and a method of making food product in a container for cooking in a microwave oven
JP11127590A JPH11346692A (en) 1998-05-08 1999-05-07 Pasta packaged in bowl and cookable with microwave oven
ARP990102159 AR013039A1 (en) 1998-05-08 1999-05-07 FAST FOOD PRODUCT AND EASY PREPARATION OR USE, METHOD FOR HYDRATION OF SUCH PRODUCT, AND PRODUCT HYDRATED BY SUCH METHOD
SG1999002149A SG72951A1 (en) 1998-10-02 1999-05-07 Container for microwave cooking of food products containing liquids
TW088107447A TW457213B (en) 1998-10-02 1999-06-15 Container for microwave cooking of food products containing liquids

Applications Claiming Priority (1)

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US09/165,080 US6175105B1 (en) 1998-10-02 1998-10-02 Container for microwave cooking of food products containing liquids

Related Parent Applications (1)

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US09/084,140 Continuation-In-Part US6106882A (en) 1998-05-26 1998-05-26 Wet toasted pasta and method of manufacture

Related Child Applications (1)

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US09/200,274 Continuation-In-Part US6514547B1 (en) 1998-05-08 1998-11-24 Hydratable granular soup or sauce product

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US (1) US6175105B1 (en)
EP (1) EP0990597B1 (en)
JP (1) JP2000107028A (en)
KR (1) KR20000028569A (en)
AT (1) ATE276165T1 (en)
AU (1) AU754912B2 (en)
CA (1) CA2271334C (en)
DE (1) DE69920128T2 (en)
IL (1) IL129841A (en)
NZ (1) NZ335590A (en)
PL (1) PL188753B1 (en)
SG (1) SG72951A1 (en)
TW (1) TW457213B (en)
ZA (1) ZA993150B (en)

Cited By (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6429408B2 (en) * 1999-12-18 2002-08-06 Schott Glas Cooking device
US6672473B2 (en) 2001-04-12 2004-01-06 General Mills, Inc. Microwavable food container with reinforcing flange and sidewall
US20040232144A1 (en) * 2003-05-21 2004-11-25 Edmark John Thomas Microwave beverage and food preparation apparatus
US20060006172A1 (en) * 2004-07-09 2006-01-12 Sedlmayr Steven R Microwave fluid heating and distillation method
US20070090103A1 (en) * 2005-10-20 2007-04-26 Conagra Foods Steam cooking apparatus
US20070116806A1 (en) * 2005-11-23 2007-05-24 Parsons Steven M Food tray
US20070181008A1 (en) * 2005-10-20 2007-08-09 Adam Pawlick Cooking method and apparatus
US20070210061A1 (en) * 2006-03-01 2007-09-13 Hamilton Beach/Proctor-Silex, Inc. Slow cooker
US20080210686A1 (en) * 2007-03-02 2008-09-04 Conagra Foods Rdm, Inc. Multi-Component Packaging System and Apparatus
US20080314526A1 (en) * 2007-06-22 2008-12-25 Lap Shun Hui Hole punch with automatic reinforcement ring placement
US20090078125A1 (en) * 2005-10-20 2009-03-26 Adam Pawlick Cooking method and apparatus
US20090134152A1 (en) * 2005-10-27 2009-05-28 Sedlmayr Steven R Microwave nucleon-electron-bonding spin alignment and alteration of materials
US20090142455A1 (en) * 2007-11-29 2009-06-04 Conagra Foods Rdm, Inc. Dessert food package
US20090179039A1 (en) * 2008-01-11 2009-07-16 Tim Cimmerer Domed casserole roaster container
US20090260525A1 (en) * 2008-04-17 2009-10-22 Brain Jordan Cake pan
USD635816S1 (en) 2006-06-09 2011-04-12 Conagra Foods Rdm, Inc. Container basket
USD638701S1 (en) 2010-09-08 2011-05-31 Conagra Foods Rdm, Inc. Container
USD639186S1 (en) 2010-09-08 2011-06-07 Conagra Foods Rdm, Inc. Container with sleeve
USD639656S1 (en) 2010-09-08 2011-06-14 Con Agra Foods RDM, Inc. Container lid
US8096452B1 (en) 2008-07-22 2012-01-17 Rogers Dwight D Clothing wrinkle removal apparatus and method
USD680426S1 (en) 2012-06-12 2013-04-23 Conagra Foods Rdm, Inc. Container
US8613249B2 (en) 2007-08-03 2013-12-24 Conagra Foods Rdm, Inc. Cooking apparatus and food product
USD717162S1 (en) 2012-06-12 2014-11-11 Conagra Foods Rdm, Inc. Container
US8887918B2 (en) 2005-11-21 2014-11-18 Conagra Foods Rdm, Inc. Food tray
US9027825B2 (en) 2012-06-12 2015-05-12 Conagra Foods Rdm, Inc. Container assembly and foldable container system
US20150351579A1 (en) * 2014-06-09 2015-12-10 Whirlpool Corporation Method of regulating temperature for sous vide cooking and apparatus therefor
US9351606B2 (en) 2011-03-03 2016-05-31 Hamilton Beach Brands, Inc. Kitchen appliance and method of assembling same
EP3176857A1 (en) 2004-07-22 2017-06-07 BrightVolt, Inc. Improved battery tab and packaging design
US9676539B2 (en) 2013-05-24 2017-06-13 Graphic Packaging International, Inc. Package for combined steam and microwave heating of food
USD789787S1 (en) 2013-08-27 2017-06-20 Nong Shim Co., Ltd. Bowl for instant noodles
WO2017201337A1 (en) * 2016-05-20 2017-11-23 Manos George Jr Microwave dish with heat pedestal
US9918362B2 (en) 2011-03-25 2018-03-13 Arkalumen Inc. Control unit and lighting apparatus including light engine and control unit
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US10092140B2 (en) 2014-10-31 2018-10-09 Richard Arnold Dasen, JR. Fanning plate for a baked potato
US10292522B2 (en) 2014-08-15 2019-05-21 Progressive International Corporation Micro kettle
USD859917S1 (en) 2017-09-23 2019-09-17 Richard Arnold Dasen, JR. Cooking device
FR3093664A1 (en) * 2019-03-11 2020-09-18 Europlastiques A method of manufacturing by molding a container having at least one double-curved surface on which a label is applied.
WO2022115522A1 (en) * 2020-11-25 2022-06-02 Meyer Intellectual Properties Limited Cookware for use in a microwave oven
US11930833B2 (en) 2017-02-14 2024-03-19 Kraft Foods Group Brands Llc Process for maintaining freshness of vegetable pieces

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3751194B2 (en) * 2000-02-01 2006-03-01 三洋エンジニアリング株式会社 Packaging container for microwave oven
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KR101772538B1 (en) 2015-07-20 2017-08-30 강원대학교산학협력단 Microwave oven packaging

Citations (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2118918A (en) 1982-03-29 1983-11-09 Thatcher Glass Corp Glass containers suitable for microwave heating
US4416907A (en) 1981-07-13 1983-11-22 Golden Valley Foods Inc. Process for preparing food packages for microwave heating
EP0128425A1 (en) 1983-06-03 1984-12-19 FP Corporation Container
USD279168S (en) 1982-12-08 1985-06-11 Erica Goldsmith Trust Packaging container or the like
US4560850A (en) * 1984-12-03 1985-12-24 Aluminum Company Of America Container with steam port for use in microwave ovens
US4859822A (en) * 1988-05-19 1989-08-22 Mobil Oil Corporation Microwaveable container
US4892213A (en) * 1986-01-06 1990-01-09 Mason Jr Stanley I Microwave cooking and serving dish
USD310464S (en) 1988-11-22 1990-09-11 Dart Industries Inc. Covered dish or the like
USD323097S (en) 1989-04-07 1992-01-14 Dart Industries Inc. Covered salad bowl or the like
US5171952A (en) 1991-10-04 1992-12-15 General Housewares Corp. Microwave kettle with reentrant base
USD337051S (en) 1991-01-23 1993-07-06 Toko Ag Ski wax container
WO1993023971A1 (en) 1992-05-21 1993-11-25 Campbell Soup Company Metal container and use thereof in a microwave oven
US5305911A (en) 1992-10-16 1994-04-26 Sandusky Plastics, Inc. Faceted container
US5315083A (en) * 1992-05-12 1994-05-24 Green Robert E Microwave cooking utensil
US5393543A (en) 1991-06-10 1995-02-28 Laufer; Stephen Process for preparing low fat potato chips and shoestring potatoes
US5397586A (en) 1993-04-09 1995-03-14 American Maize-Products Company Pasta products
US5414248A (en) 1991-12-24 1995-05-09 Eastman Chemical Company Grease and moisture absorbing inserts for microwave cooking
US5416304A (en) 1990-11-13 1995-05-16 Kraft General Foods, Inc. Microwave-reflective device and method of use
US5416305A (en) 1993-12-10 1995-05-16 Tambellini; Daniel A. Microwave heating package and method for achieving oven baked quality for sandwiches
US5423453A (en) * 1993-05-21 1995-06-13 Mobil Oil Corporation Microwaveable container
US5427741A (en) 1993-05-19 1995-06-27 Cem Corporation Pressure resistant reinforcing means for containers for materials to be microwave heated
US5451418A (en) 1992-06-24 1995-09-19 General Mills, Inc. Microwave treatment of unchlorinated cake flour
US5460839A (en) 1991-06-19 1995-10-24 Hunt-Wesson, Inc. Microwavable food package having a bag with reverse folded gussets
US5483044A (en) 1993-06-25 1996-01-09 Merrychef Limited Microwave heating with hot and cold air streams
US5491323A (en) 1992-12-21 1996-02-13 Matsushita Electric Industrial Co., Ltd. High frequency heating apparatus for heating a material and a method of heating a material by high frequency irradiation
US5510132A (en) 1994-06-07 1996-04-23 Conagra, Inc. Method for cooking a food item in microwave heating package having end flaps for elevating and venting the package
US5519195A (en) 1989-02-09 1996-05-21 Beckett Technologies Corp. Methods and devices used in the microwave heating of foods and other materials
US5527413A (en) 1990-12-20 1996-06-18 The Pillsbury Company Temperature controlled susceptor structure
US5539187A (en) 1990-01-10 1996-07-23 Patentsmith Corportion Microwave oven for heating food products
US5541390A (en) 1995-03-20 1996-07-30 Cidelcem Industries Tunnel oven for microwave heating and cooking foods
US5548101A (en) 1993-12-15 1996-08-20 Samsung Electronics Co., Ltd. Microwave oven with a function of induction heating and the control method thereof
US5582854A (en) 1993-07-05 1996-12-10 Ajinomoto Co., Inc. Cooking with the use of microwave
US5589093A (en) 1995-07-20 1996-12-31 Electronics Research & Service Organization Microwave heating chamber for vending machines
US5588587A (en) 1995-11-22 1996-12-31 International Paper Dual ovenable food package
US5593610A (en) 1995-08-04 1997-01-14 Hormel Foods Corporation Container for active microwave heating

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5039001A (en) * 1990-06-18 1991-08-13 Kraft General Foods, Inc. Microwavable package and process
JPH0480427U (en) * 1990-11-28 1992-07-14
JPH1191836A (en) * 1997-09-19 1999-04-06 Dainippon Printing Co Ltd Container for microwave oven

Patent Citations (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4416907A (en) 1981-07-13 1983-11-22 Golden Valley Foods Inc. Process for preparing food packages for microwave heating
GB2118918A (en) 1982-03-29 1983-11-09 Thatcher Glass Corp Glass containers suitable for microwave heating
USD279168S (en) 1982-12-08 1985-06-11 Erica Goldsmith Trust Packaging container or the like
EP0128425A1 (en) 1983-06-03 1984-12-19 FP Corporation Container
US4704510A (en) * 1983-06-03 1987-11-03 Fukuyama Pearl Shiko Kabushiki Kaisha Containers for food service
US4560850A (en) * 1984-12-03 1985-12-24 Aluminum Company Of America Container with steam port for use in microwave ovens
US4892213A (en) * 1986-01-06 1990-01-09 Mason Jr Stanley I Microwave cooking and serving dish
US4859822A (en) * 1988-05-19 1989-08-22 Mobil Oil Corporation Microwaveable container
USD310464S (en) 1988-11-22 1990-09-11 Dart Industries Inc. Covered dish or the like
US5519195A (en) 1989-02-09 1996-05-21 Beckett Technologies Corp. Methods and devices used in the microwave heating of foods and other materials
USD323097S (en) 1989-04-07 1992-01-14 Dart Industries Inc. Covered salad bowl or the like
US5539187A (en) 1990-01-10 1996-07-23 Patentsmith Corportion Microwave oven for heating food products
US5416304A (en) 1990-11-13 1995-05-16 Kraft General Foods, Inc. Microwave-reflective device and method of use
US5527413A (en) 1990-12-20 1996-06-18 The Pillsbury Company Temperature controlled susceptor structure
USD337051S (en) 1991-01-23 1993-07-06 Toko Ag Ski wax container
US5393543A (en) 1991-06-10 1995-02-28 Laufer; Stephen Process for preparing low fat potato chips and shoestring potatoes
US5460839A (en) 1991-06-19 1995-10-24 Hunt-Wesson, Inc. Microwavable food package having a bag with reverse folded gussets
US5171952A (en) 1991-10-04 1992-12-15 General Housewares Corp. Microwave kettle with reentrant base
US5414248A (en) 1991-12-24 1995-05-09 Eastman Chemical Company Grease and moisture absorbing inserts for microwave cooking
US5315083A (en) * 1992-05-12 1994-05-24 Green Robert E Microwave cooking utensil
WO1993023971A1 (en) 1992-05-21 1993-11-25 Campbell Soup Company Metal container and use thereof in a microwave oven
US5451418A (en) 1992-06-24 1995-09-19 General Mills, Inc. Microwave treatment of unchlorinated cake flour
US5305911A (en) 1992-10-16 1994-04-26 Sandusky Plastics, Inc. Faceted container
US5491323A (en) 1992-12-21 1996-02-13 Matsushita Electric Industrial Co., Ltd. High frequency heating apparatus for heating a material and a method of heating a material by high frequency irradiation
US5397586A (en) 1993-04-09 1995-03-14 American Maize-Products Company Pasta products
US5427741A (en) 1993-05-19 1995-06-27 Cem Corporation Pressure resistant reinforcing means for containers for materials to be microwave heated
US5423453A (en) * 1993-05-21 1995-06-13 Mobil Oil Corporation Microwaveable container
US5483044A (en) 1993-06-25 1996-01-09 Merrychef Limited Microwave heating with hot and cold air streams
US5582854A (en) 1993-07-05 1996-12-10 Ajinomoto Co., Inc. Cooking with the use of microwave
US5416305A (en) 1993-12-10 1995-05-16 Tambellini; Daniel A. Microwave heating package and method for achieving oven baked quality for sandwiches
US5548101A (en) 1993-12-15 1996-08-20 Samsung Electronics Co., Ltd. Microwave oven with a function of induction heating and the control method thereof
US5510132A (en) 1994-06-07 1996-04-23 Conagra, Inc. Method for cooking a food item in microwave heating package having end flaps for elevating and venting the package
US5541390A (en) 1995-03-20 1996-07-30 Cidelcem Industries Tunnel oven for microwave heating and cooking foods
US5589093A (en) 1995-07-20 1996-12-31 Electronics Research & Service Organization Microwave heating chamber for vending machines
US5593610A (en) 1995-08-04 1997-01-14 Hormel Foods Corporation Container for active microwave heating
US5588587A (en) 1995-11-22 1996-12-31 International Paper Dual ovenable food package

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
European Research Search Report No. EP 99 10 8581.

Cited By (62)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6429408B2 (en) * 1999-12-18 2002-08-06 Schott Glas Cooking device
US6672473B2 (en) 2001-04-12 2004-01-06 General Mills, Inc. Microwavable food container with reinforcing flange and sidewall
US20040232144A1 (en) * 2003-05-21 2004-11-25 Edmark John Thomas Microwave beverage and food preparation apparatus
US7038181B2 (en) 2003-05-21 2006-05-02 Megadex Corporation Microwave beverage and food preparation apparatus
US20060151484A1 (en) * 2003-05-21 2006-07-13 Edmark John T Microwave beverage and food preparation apparatus
US20060006172A1 (en) * 2004-07-09 2006-01-12 Sedlmayr Steven R Microwave fluid heating and distillation method
US7119312B2 (en) * 2004-07-09 2006-10-10 Sedlmayr Steven R Microwave fluid heating and distillation method
US20060289502A1 (en) * 2004-07-09 2006-12-28 Sedlmayr Steven R Microwave fluid heating and distillation method
EP3176857A1 (en) 2004-07-22 2017-06-07 BrightVolt, Inc. Improved battery tab and packaging design
US10569949B2 (en) 2005-10-20 2020-02-25 Conagra Foods Rdm, Inc. Cooking method and apparatus
US9505542B2 (en) 2005-10-20 2016-11-29 Conagra Foods Rdm, Inc. Cooking method and apparatus
US8302528B2 (en) 2005-10-20 2012-11-06 Conagra Foods Rdm, Inc. Cooking method and apparatus
US8850964B2 (en) 2005-10-20 2014-10-07 Conagra Foods Rdm, Inc. Cooking method and apparatus
US20070181008A1 (en) * 2005-10-20 2007-08-09 Adam Pawlick Cooking method and apparatus
US9211030B2 (en) 2005-10-20 2015-12-15 Conagra Foods Rdm, Inc. Steam cooking apparatus
US20090078125A1 (en) * 2005-10-20 2009-03-26 Adam Pawlick Cooking method and apparatus
US20070090103A1 (en) * 2005-10-20 2007-04-26 Conagra Foods Steam cooking apparatus
US20090134152A1 (en) * 2005-10-27 2009-05-28 Sedlmayr Steven R Microwave nucleon-electron-bonding spin alignment and alteration of materials
US8887918B2 (en) 2005-11-21 2014-11-18 Conagra Foods Rdm, Inc. Food tray
US9815607B2 (en) 2005-11-21 2017-11-14 Conagra Foods Rdm, Inc. Food tray
US9132951B2 (en) 2005-11-23 2015-09-15 Conagra Foods Rdm, Inc. Food tray
US20070116806A1 (en) * 2005-11-23 2007-05-24 Parsons Steven M Food tray
US7485831B2 (en) 2006-03-01 2009-02-03 Hamilton Beach Brands, Inc. Slow cooker
US20100230398A1 (en) * 2006-03-01 2010-09-16 Hamilton Beach Brands, Inc. Slow cooker
US20070210061A1 (en) * 2006-03-01 2007-09-13 Hamilton Beach/Proctor-Silex, Inc. Slow cooker
US7947928B2 (en) 2006-03-01 2011-05-24 Hamilton Beach Brands, Inc. Slow cooker
USD653495S1 (en) 2006-06-09 2012-02-07 Conagra Foods Rdm, Inc. Container basket
USD635816S1 (en) 2006-06-09 2011-04-12 Conagra Foods Rdm, Inc. Container basket
USD636218S1 (en) 2006-06-09 2011-04-19 Conagra Foods Rdm, Inc. Container assembly
USD635817S1 (en) 2006-06-09 2011-04-12 Conagra Foods Rdm, Inc. Container assembly
US20080210686A1 (en) * 2007-03-02 2008-09-04 Conagra Foods Rdm, Inc. Multi-Component Packaging System and Apparatus
USD610903S1 (en) 2007-03-02 2010-03-02 Conagra Foods Rdm, Inc. Container assembly
US8866056B2 (en) 2007-03-02 2014-10-21 Conagra Foods Rdm, Inc. Multi-component packaging system and apparatus
US20080314526A1 (en) * 2007-06-22 2008-12-25 Lap Shun Hui Hole punch with automatic reinforcement ring placement
US8613249B2 (en) 2007-08-03 2013-12-24 Conagra Foods Rdm, Inc. Cooking apparatus and food product
US20090142455A1 (en) * 2007-11-29 2009-06-04 Conagra Foods Rdm, Inc. Dessert food package
US20090179039A1 (en) * 2008-01-11 2009-07-16 Tim Cimmerer Domed casserole roaster container
US20090260525A1 (en) * 2008-04-17 2009-10-22 Brain Jordan Cake pan
US8096452B1 (en) 2008-07-22 2012-01-17 Rogers Dwight D Clothing wrinkle removal apparatus and method
USD639186S1 (en) 2010-09-08 2011-06-07 Conagra Foods Rdm, Inc. Container with sleeve
USD639656S1 (en) 2010-09-08 2011-06-14 Con Agra Foods RDM, Inc. Container lid
USD638701S1 (en) 2010-09-08 2011-05-31 Conagra Foods Rdm, Inc. Container
US9351606B2 (en) 2011-03-03 2016-05-31 Hamilton Beach Brands, Inc. Kitchen appliance and method of assembling same
US9918362B2 (en) 2011-03-25 2018-03-13 Arkalumen Inc. Control unit and lighting apparatus including light engine and control unit
USD680426S1 (en) 2012-06-12 2013-04-23 Conagra Foods Rdm, Inc. Container
US9027825B2 (en) 2012-06-12 2015-05-12 Conagra Foods Rdm, Inc. Container assembly and foldable container system
USD717162S1 (en) 2012-06-12 2014-11-11 Conagra Foods Rdm, Inc. Container
US10301100B2 (en) 2013-05-24 2019-05-28 Graphic Packaging International, Llc Package for combined steam and microwave heating of food
US9676539B2 (en) 2013-05-24 2017-06-13 Graphic Packaging International, Inc. Package for combined steam and microwave heating of food
USD789787S1 (en) 2013-08-27 2017-06-20 Nong Shim Co., Ltd. Bowl for instant noodles
US20190223647A1 (en) * 2014-06-09 2019-07-25 Whirlpool Corporation Method of regulating temperature for sous vide cooking and apparatus therefor
US10085584B2 (en) * 2014-06-09 2018-10-02 Whirlpool Corporation Method of regulating temperature for sous vide cooking and apparatus therefor
US20150351579A1 (en) * 2014-06-09 2015-12-10 Whirlpool Corporation Method of regulating temperature for sous vide cooking and apparatus therefor
US10292521B2 (en) 2014-06-09 2019-05-21 Whirlpool Corporation Method of regulating temperature for sous vide cooking and apparatus therefor
US10292522B2 (en) 2014-08-15 2019-05-21 Progressive International Corporation Micro kettle
US10092140B2 (en) 2014-10-31 2018-10-09 Richard Arnold Dasen, JR. Fanning plate for a baked potato
WO2017201337A1 (en) * 2016-05-20 2017-11-23 Manos George Jr Microwave dish with heat pedestal
US20180229915A1 (en) * 2017-02-14 2018-08-16 Kraft Foods Group Brands Llc Packaged food product with vegetable components
US11930833B2 (en) 2017-02-14 2024-03-19 Kraft Foods Group Brands Llc Process for maintaining freshness of vegetable pieces
USD859917S1 (en) 2017-09-23 2019-09-17 Richard Arnold Dasen, JR. Cooking device
FR3093664A1 (en) * 2019-03-11 2020-09-18 Europlastiques A method of manufacturing by molding a container having at least one double-curved surface on which a label is applied.
WO2022115522A1 (en) * 2020-11-25 2022-06-02 Meyer Intellectual Properties Limited Cookware for use in a microwave oven

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SG72951A1 (en) 2000-05-23
ZA993150B (en) 1999-11-05
ATE276165T1 (en) 2004-10-15
TW457213B (en) 2001-10-01
EP0990597B1 (en) 2004-09-15
IL129841A (en) 2002-12-01
KR20000028569A (en) 2000-05-25
DE69920128T2 (en) 2005-01-20
PL333002A1 (en) 2000-04-10
NZ335590A (en) 2000-09-29
PL188753B1 (en) 2005-04-29
AU2699499A (en) 2000-04-06
DE69920128D1 (en) 2004-10-21
CA2271334C (en) 2002-10-01
EP0990597A1 (en) 2000-04-05

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